Commitments and Contingencies	3 Months Ended
Commitments and Contingencies	Mar. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies From time to time, third parties may assert patent infringement claims against us in the form of letters, litigation, or other forms of communication. In addition, we may from time to time be subject to other legal proceedings and claims in the ordinary course of business, including claims of alleged infringement of trademarks, copyrights, and other intellectual property rights; employment claims; and general contract or other claims. We may also, from time to time, be subject to various legal or government claims, disputes, or investigations. Such matters may include, but not be limited to, claims, disputes, or investigations related to warranty, refund, breach of contract, employment, intellectual property, government regulation, or compliance or other matters. On December 1, 2020, we received notice that a class action lawsuit was filed against Chegg in New York alleging violations of the American with Disabilities Act. The claim asserted that one of Chegg’s websites is not compatible with software used by vision-impaired individuals. During the three months ended March 31, 2021, we settled this matter for an immaterial amount. On August 18, 2020, we received notice that a class action lawsuit was filed against Chegg in California alleging violations of the Unruh Civil Rights Act. The claim asserted that one of Chegg’s websites is not compatible with software used by vision-impaired individuals. During the three months ended March 31, 2021, we settled this matter for an immaterial amount. On July 21, 2020, VitalSource Technologies LLC (VST), which is wholly owned by Ingram Industries Inc., filed a complaint against Chegg alleging that Chegg breached its contract with VST involving the development of an eTextbook reader and eTextbook reader platform. The suit sought uncertain damages, but the complaint alleged that they exceeded $75,000. During the three months ended March 31, 2021, we recorded an immaterial loss contingency accrual and subsequently settled this matter in April 2021. On June 18, 2020, we received a Civil Investigative Demand (CID) from the Federal Trade Commission (FTC) to determine whether we may have violated Section 5 of the FTC Act or the Children's Online Privacy Protection Act (COPPA), as they relate to deceptive or unfair acts or practices related to consumer privacy and/or data security. Pursuant to the CID, the FTC has requested responses to interrogatories and the production of documents pertaining to data breach incidents and our data security and privacy practices generally. Efforts are currently underway to collect the documents and information requested after reaching an agreement with the FTC on the order and timing of our responses. On May 12, 2020, we received notice that 15,107 arbitration demands were filed against us by individuals represented by the same legal counsel, each alleging to have suffered more than $25,000 in damages as a result of the 2018 Data Incident. On July 1, 2020, an additional 1,007 arbitration demands were filed by the same counsel. On August 12, 2020, an additional 577 arbitration demands were filed by the same counsel; cases have been filed by the same counsel in Maryland and California. We dispute that these claimants have a valid basis for seeking arbitration, assert that they have acted in bad faith and are working with the Maryland and California courts and plaintiffs’ counsel on resolution of these claims. During the three months ended March 31, 2021, we recorded a loss contingency accrual and a corresponding insurance loss recovery, the net impact of which did not materially impact our condensed consolidated statements of operations. On November 5, 2018, NetSoc, LLC (NetSoc) filed a complaint against us in the U.S. District Court for the Southern District of New York (SDNY) for patent infringement alleging that the Chegg Tutors service infringes U.S. Patent No. 9.978,107 and seeking unspecified compensatory damages. A responsive pleading was filed on February 19, 2019. On January 13, 2020, the SDNY issued an order dismissing the case as to Chegg. On January 30, 2020, NetSoc appealed the dismissal. On April 21, 2020, the SDNY granted Chegg's motion to hold NetSoc's appeal in abeyance pending the outcome of an appeal in the litigation above. On December 2, 2020, the U.S. Patent and Trademark Office determined that the patent is invalid based on two Inter Partes Review (IPR) proceedings and on January 4, 2021, NetSoc filed a notice of appeal appealing the IPR decision. Aside from the loss contingency accruals for the VST and 2018 Data Incident matters, we have not recorded any additional amounts related to the above matters as we do not believe that a loss is probable in these remaining matters. We are not aware of any other pending legal matters or claims, individually or in the aggregate, that are expected to have a material adverse impact on our condensed consolidated financial position, results of operations, or cash flows. However, our analysis of whether a claim will proceed to litigation cannot be predicted with certainty, nor can the results of litigation be predicted with certainty. Nevertheless, defending any of these actions, regardless of the outcome, may be costly, time consuming, distract management personnel and have a negative effect on our business. An adverse outcome in any of these actions, including a judgment or settlement, may cause a material adverse effect on our future business, operating results and/or financial condition.